On 24/07/14 14:00, Hanjun Guo wrote:
From: Al Stone <[email protected]> Introduce two early parameters for "acpi", one is the parameter to disable ACPI on ARM64 and another one is acpi=strict to disable out-of-spec workarounds. Reviewed-by: Grant Likely <[email protected]> Signed-off-by: Al Stone <[email protected]> Signed-off-by: Graeme Gregory <[email protected]> Signed-off-by: Hanjun Guo <[email protected]> --- Documentation/kernel-parameters.txt | 3 ++- arch/arm64/kernel/acpi.c | 21 +++++++++++++++++++++ 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index b7fa2f5..d130bd5 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -165,7 +165,7 @@ multipliers 'Kilo', 'Mega', and 'Giga', equalling 2^10, 2^20, and 2^30 bytes respectively. Such letter suffixes can also be entirely omitted. - acpi= [HW,ACPI,X86] + acpi= [HW,ACPI,X86,ARM] Advanced Configuration and Power Interface Format: { force | off | strict | noirq | rsdt } force -- enable ACPI if default was off @@ -175,6 +175,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted. strictly ACPI specification compliant. rsdt -- prefer RSDT over (default) XSDT copy_dsdt -- copy DSDT to memory + For ARM64, ONLY "off" and "strict" are available. See also Documentation/power/runtime_pm.txt, pci=noacpi diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index c62fce6..ac78e4e 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -74,3 +74,24 @@ void __init acpi_boot_table_init(void) return; } } + +static int __init parse_acpi(char *arg) +{ + if (!arg) + return -EINVAL; + + /* "acpi=off" disables both ACPI table parsing and interpreter */ + if (strcmp(arg, "off") == 0) { + disable_acpi(); + } + /* acpi=strict disables out-of-spec workarounds */ + else if (strcmp(arg, "strict") == 0) { + acpi_strict = 1;
This should be default set as I mentioned in patch#1. We can introduce this option if required in future. Regards, Sudeep -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
